build(deps): bump posthtml from 0.16.6 to 0.16.7

Bumps [posthtml](https://github.com/posthtml/posthtml) from 0.16.6 to 0.16.7.
- [Release notes](https://github.com/posthtml/posthtml/releases)
- [Changelog](https://github.com/posthtml/posthtml/blob/master/changelog.md)
- [Commits](posthtml/posthtml@v0.16.6...v0.16.7)

---
updated-dependencies:
- dependency-name: posthtml
  dependency-version: 0.16.7
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]